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已知等差数列{an}满足a5＝13，a1+a3＝8． （1）求{an}的通项公式 （2）设Sn是等比数列{bn}的前n项和若b1＝a1，b3＝a4﹣1，求S6．
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高二下学期数学《》真题及答案
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Mr.PeterJohnsonagedtwenty﹣threebattledforhalfanhourtoescapefromhistrappedcaryesterdaywhenitlandedupsidedowninthreefeetofwater.Mr.Johnsontooktheonlyescaperoute﹣﹣throughtheboot行李箱. Mr.Johnson'scarhadfinishedupinaditch沟渠atRomneyMarsinKentafterskiddingoniceandhittingabank.FortunatelythewaterbegantocomeinonlyslowlyMr.JohnsonsaidIcouldn'tforcethedoorsbecausetheywerejammedagainstthewallsoftheditchanddarednotopenthewindowsbecauseIknewwaterwouldcomefloodingin. Mr.JohnsonasweetsalesmanofSittingHomeKentfirsttriedtoattracttheattentionofothermotoristsbysoundingthehornandhammeringontheroofandboot.Thenhebeganhisstruggletoescape. LaterhesaidItwasreallyahalfpennythatsavedmylife.ItwastheonlycoinIhadinmypocketandIusedittounscrewthebackseattogetintotheboot.Ihammereddesperatelywithahammertryingtomakesomeonehearbutnohelpcame. Ittooktenminutestounscrewtheseatandafurtherfiveminutestoclearthesweetsamplesfromtheboot.ThenMr.Johnsonfoundawrenchandbegantoworkonthebootlock.Fifteenminutespassedby.ItwastheonlychanceIhad.FinallyitgavebutassoonasImovedthebootlidthewaterandmudpouredin.Iforcedtheliddownintothemudandscrambledclearasthecarfilledup. HishandsandarmscutandbruisedMr.JohnsongottoBeckettFarmnearbywherehewaslookedafterbythefarmer'swifeMrs.LucyBates.TremblinginablankethesaidThatthirtyminutesseemedlikehours.Onlythetipsofthecarwheelswerevisiblepolicesaidlastnight.Thevehiclehadsunkintotwofeetofmudatthebottomoftheditch. 1Inwhichsectionofanewspapercanwereadthisarticle? A.Bookreview B.Newsreport C.Campuslife D.Continuedstory 2TheunderlinedsentenceinParagraph5Finallyitgavemeansthat. A.luckilythedoorwastornawayintheend B.atlastthewrenchwentbroken C.thelockcameopenafterallhisefforts D.thechancewaslostatthelastminute 3Itcanbeinferredfromthepassagethat. A.theditchwasalongaquietcountryroad B.theaccidenthappenedonaclearwarmday C.thepolicehelpedMr.Johnsongetoutoftheditch D.Mr.Johnsonhadatenderwifeandwaswellattended
Wehaveagrowingpopulationandtweneedmorefood.
TheMonkeesbupabout1970buthappilytheyreunitedinthemid﹣1980﹩.
WhilecheckingoutatthegrocerystoreInoticedawomanbehindme.Shewas1oneofshoppingcartswiththebasketinfront.Thebasket2justafewitemssomeapplesaloafofbreadsomecannedgoodsanda3ofcoral﹣coloredroses.I4toherthattheywereindeedverylovelyroses.ShesaidIreallydolovethemthey'remyfavorite5. WelljustasIwasleavingIheardhersaytothecashierYoucan6thebunchofrosesbackIreallycouldn't7them.Iturnedaroundandaskedherifshewould8metogetthemforher.She9herheadandsaidWhywouldyouwanttodothat?Youcertainlydon'thaveto.IrepliedthatIjustwantedto10sinceshelovedthemsomuch.Shestillseemed11.SoItoldher12shewouldallowmeto13themtohershewouldbedoingmeafavor.WithtearsinhereyesshesaidIreallydolovethem.Thanks.AsI14thecashierthemoneyfortherosesInoticedhewasalittle15aswell. OnthewayhomeIwasreminded16asongIhadhearddecadesagoandI'velovediteversince.Thesongis'BreadandRoses'.It'sabeautifulsongonmanylevelsandremindsusthatwe17needfoodbutweallalsoneed18. Alinefromthissongfitsthissituationperfectly.It19Heartsstarveaswellasbodies.Giveusbreadbutgiveus20too. 1A.driving B.holding C.dragging D.pushing 2A.held B.Put C.presented D.produced 3A.box B.bunch C.basket D.handful 4A.Showed B.commented C.introduced D.recommended 5A.smell B.shape C.color D.memory 6A.deal B.put C.pick D.come 7A.make B.collect C.manage D.afford 8A.allow B.advise C.want D.prefer 9A.nodded B.shook C.lowered D.raised 10A.partly B.especially C.specially D.merely 11A.puzzled B.shocked C.hesitant D.Regretful 12A.if B.but C.only D.just 13A.owe B.pass C.gift D.deliver 14A.charged B.awarded C.offered D.handed 15A.teary﹣eyed B.starry﹣eyed C.weary﹣eyed D.sharp﹣eyed 16A.of B.for C.to D.if 17A.notif B.notbut C.noteven D.notonly 18A.love B.share C.money D.beauty 19A.reads B.sings C.speaks D.shows 20A.goodness B.roses C.comfort D.medicine
WhenIpackedupmylifeandmovedfromthecomfortsofmylittlehometowntoWacoIrememberfeeling1lose.AllmyfriendsweresoexcitedtostarttheirownlivesbutIjustwasn'tsure2Iwasreadyforthatyet.Manythingsworriedme.ButIhidmyfearsandwhenthetime3finalcameIhuggedmymothergoodbyemadethetwo﹣hourone﹣waydrivefromCoppeltoWacoandsetupmynewroom. ForthefirstfewweeksIdidn'tmisshomeorreallyfeelanykindofemotionatallexcepttired.Therewassomuchformetolearn4Ihadn'thadtimetothinkaboutanything.Myenergy5directtowardsfiguringoutcampusadjustingtocollege﹣levelclassesandrememberingthenamesofeverynewpersonImet.Iexploredeverycorner6lookfortheperfectplacetostudy.Ilearnedtoset7IascheduleofgettinggroceriescleaningmyroomanddoingmylaundryonSundays. NowadaysinmysecondsemesterIfeellikeIhavealmostadapted8theuniversitylife.Thetransitionfromhighschooltocollegewasn't9difficultasmymindmademethinkitwouldbe.Oneofthebest10thingcollegehastaughtmeishowtobeindependent.
ItwasMother'sDaybuttheyoungmotherwasalittleunhappybecauseshewas800milesawayfromherparents.Inthemorningshephonedhermother1wishherahappyMother'sDayandhermothertoldheraboutthebeautifullilacs丁香inthegarden.2latethatdaywhenshetoldherhusbandaboutthelilacshesaidIknowwherewecanfindallthatyouwant.Getthechildrenandcomeon.Sotheywent3drivedownthecountryroads. Thereonasmallhilltheysawalotof4beautypurplelilacs.Theyoungwomanranquicklytoenjoytheflowers.Carefullyshepickedafewhereandafewthere.Ontheirwayhometherewasasmile5herface.ziliaoqun700292070 Whentheywerepassinganursinghome养老院theyoungwomansaw6oldgrannysittinginachair.Shehadnochildrenwithher.They7stopthecarandtheyoungwomanwalkedtotheoldwomanputtheflowersinher8handandsmiledather.Theoldgrannythankedheragainandagain.Shesmiledhappilytoo. Whentheyoungmothercamebacktohercarherchildrenaskedher9isthatoldgranny?Whydidyougiveourflowerstoher? Idon'tknowher10theymothersaid.Butit'sMother'sDayandshehasnochildren.IhaveallofyouandIstillhavemymother.Justthinkhowmuchthoseflowersmeanttoher.
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AphotographthatonehastakenofoneselftypicallywithasmartphoneorwebcamanduploadedtoasocialmediawebsiteisthedefinitionofselfieintheOxfordEnglishDictionary.Infactitwasn'teveninthedictionaryuntilAugustoflastyear.Itearneditsplacetherebecausepeoplearenowsoobsessedwith对……痴迷selfies﹣wetakethemwhenwetryonanewhatplaywithourpetsorwhenwemeetafriendwhomwehaven'tseeninawhile. Butisthereanyscientificexplanationforthisobsession?WellyoushouldprobablyaskJamesKilneraneuroscientist神经系统科学家atUniversityCollegeLondon. Throughourlifetimewebecomeexpertsatrecognizingandinterpretingotherpeople'sfacesandfacialexpressions.IncontrastaccordingtoKilnerwehaveaverypoorunderstandingofourownfacessincewehavelittleexperienceoflookingatthem﹣wejustfeelthemmostofthetime. ThishasbeenprovedinpreviousstudiesaccordingtotheBB24C. Kilnerfoundthatmostpeoplechosethemoreattractivepicture.Thissuggeststhatwetendtothinkofourselvesasbetter﹣lookingthanweactuallyare.TofurthertesthowweactuallyperceiveourownfacesKilnercarriedoutanotherstudy.Heshowedpeopledifferentversionsoftheirownportrait﹣theoriginalonethathadbeeneditedtolooklessattractiveandonethatwasmademoreattractive﹣andaskedthemtopicktheversionwhichtheythoughtlookedmostlikethem.Theychosethemoreattractiveversion. Butwhatdoesitsayaboutsettles?Wellisn'tthatobvious?Selfiesgiveusthepowertocreateaphotograph﹣bytakingitfromvariousangleswithdifferentposesusingfilters滤色镜andsoon﹣thatbettermatchesourexpectationswithouractualfaces. Yousuddenlyhavecontrolinawaythatyoudon'thaveinnon﹣virtual非虚拟的interactionsKilnertoldtheCanada﹣basedCTVNews.Selfiesallowyoutokeeptakingpicturesuntilyoumanagetotakeoneyou'rehappywithheexplained. 1Whatisthepassagemainlyabout? A.Thedefinitionandfunoftakingselfies. B.Theexplanationofwhypeoplelovetakingselfies. C.Howtakingselfiesinfluencespeople'sdailylives. D.Howtointerpretpeople'sfacialexpressionsintheirselfies. 2TheunderlinedwordperceiveinParagraph5canbereplacedby. A.interpret B.beautify C.choose D.destroy 3AccordingtoKilnerpeopleliketakingselfiesprobablybecausetheythink. A.itisagoodchancetolearnmoreabouttheiractualfaces B.itisawaytorespondtoothers'facialexpressionscorrectly C.itenablesthemtointeractwiththeirfriendsinsocialmedia D.itallowsthemtosatisfytheirexpectationswiththeirappearances
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我妈妈宁可我把注意力都放在学习上. MymotherwouldratherImoreattentionmystudy.
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CoitTower CoitTowerprovides360﹣degreeviewsofSanFranciscoandthebayincludingtheGoldenGateBridge.Themostfantasticviewscanbeseenfromtheobservationdeckwhichisreachedbyanelevator.Itcosts﹩7togetontheelevator.Itis4.9milesfromCoitTowertoGoldenGateBridge. CrissyField CrissyFieldaformerarmyairportlocatedsouthoftheGoldenGateBridgeinthePresidiowasrebuiltin2001andofferswidewalkingandcyclingtrailsbetweentheMarinaGreenandFortPoint.ItofferswonderfulviewsoftheGoldenGateBridgepicnicareasandasmallsandybeachwhichispopularwithfamilies.AlongCrissyFieldvisitorscanstopforlunchattheWarmingHuttheBeachHutCafeortheHouseofAir.DistancefromGoldenGateBridge2.4milesfromtheMarinaGreen. Fort堡垄Point ForacloseviewofthebridgevisitFortPointwhichisaCivilWartimebrickfortwhichcanbeenteredthroughtheMarineDriveparkatCrissyField.AlthoughFortPointneverhadanymilitary军事的actiontheGoldenGateBridge'schiefengineerJosephStraussredesignedthebridgetopreservethefortasafineexampleofsomekindofart.nDistancefromGoldenGateBridge1.2miles. LandsEnd LandsEndnearLincolnParkoffersaperfectviewoftheGoldenGateBridge.Visitorscanwalkalongapavedsidewalknearthe17thholeoftheLincolnParkMunicipalGolfCourse.Herethereareseveralbenchesandphotoopportunitiestopicturethebeautyofthebridge.DistancefromGoldenGateBridge3.0miles. 1Wherecanvisitorshaveapicnic? A.AtCoitTower. B.AtCrissyField. C.AtFortPoint. D.AtLandsEnd. 2WhydidJosephredesignthebridge? A.Toofferwidewalkingandcycling. B.Topicturethebeautyofthebridge. C.Totakeacloseviewofthebridge. D.Tosavethefortasanart. 3Whatisthepurposeofthetext? A.TointroducesomeplacestoviewGoldenGateBridge. B.TointroducesomegreatplacesinGoldenGateBridge. C.TocomparethefourfamousplacesinSanFrancisco. D.TointroducethehistoryofGoldenGateBridge.
DaniellaWridewasbrushingherdaughter'slongbrownhairwhenshenoticedthatwitheachcombmassesofthehairwerecomingout.ThatwasJanuary12017.Within20daysseven﹣year﹣oldGianessaWride'shairwascompletelygoneandherdoctorsaidthehairwouldnevergrowback.Gianessahadbecomeoneofthe6.8millionAmericanswithalopeciaanauto﹣immunediseasethatcauseshairloss. Alopeciaisn'tpainfulbutforkidswhosufferfromittheseverepaincomesfromstandingoutfromthecrowd.ForthemostpartthestudentsinGianessa'sfirst﹣gradeclassinSalemUtahwereunderstanding.ButtheoccasionaljokesofBaldymadeherfeellikeanabandonedchild.Ididn'twanthertofeelthatshewasn'tliketheotherkidshermothersaid.Itriedcoveringherbaldnessbuttheman﹣madehairwasuncomfortable. Thencomestheschool'straditionalCrazyHairDayinAprilagreatjust﹣for﹣funcelebrationwhereallthekidsandtheirparentscanexpresstheirwildsidesabit.DaniellaandGianessadecidedthatratherthanhideGianessa'sbaldnessundertheman﹣madehairtheywouldcelebrateit.Daniellaboughtscrapbook﹣stickerjewelsanddecoratedherheadwithflowereddesignsandevenadeer.TheyjustfitherpersonalityDaniellasmiled.She'ssolovely. OnthemorningofthecompetitionGianessawasnervous.Wouldherfriendsthinkitwasfunny?Howeverwithhermother'sencouragementshehadnothingtofear.ImpressiveGianessawasahitandawinnerofthecrazy﹣haircompetition.Gianessaisnowgladthatshedaredtogobare.IwassadatfirstwhenIlostallmyhairshetoldpeople.ButnowIlovebeingbald.Icandothingstomyheadthatotherkidscan't.I'mthinkingnowitmightbefuntodecoratemyheadwithsomecolorfulbutterfliesandflowers. 1WhywasGianessadifferentfromotherkids? A.Shewasbornbald. B.Shehadherheadfullyshaved. C.Shewastalentedinhairdesigning. D.Shesufferedfromhairloss 2HowdidothersreacttoGianessa'sdisease? A.Herdoctorwasquiteoptimistic. B.Hermothergaveherman﹣madehair. C.Herclassmateswereallconsiderate. D.Herschoolneverofferedherhelp. 3WhatcouldGianessadoontheCrazyHairDay? A.Shecouldshowherpersonality. B.Shecoulddecorateherhair. C.Shecouldshopscrapbook﹣stickers. D.Shecouldteaseothers. 4Whatisthemainideaofthetext? A.Theman﹣madehairbuiltupthegirl'sconfidence. B.Thegirlfacedherdiseaseinamostbeautifulway. C.Thecompetitionservedasawaytomakeachange D.Thediseasewascuredwithmother'sloveandcare.
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Therehasbeenanoutpouringoflovefora23﹣year﹣olddisabledwomanwhosedogwaskilledinfrontofherwhileagroomer美容师triedtotrimitsclaws. CallsandemailscamefromasfarawayastheUpperPeninsulaandArizonaaswellasOaklandandMacombcountiesofferingLaurieCrouchwhousesawheelchairbecauseofmultiplesclerosis硬化症everythingfromdogstomoneysuchasthatfromJasonDalyofRosevillewhosaidIwouldliketobuyheranewdog. AstoryaboutthedeathofCrouch'spetGoochwasprintedonthefrontpageofMacombDaily.CrouchsaidagroomertiedGoochupwithacollarandthensheandamansatonthedogtotrim修剪itsnails.Goochdiedafteroneclawwastrimmed. CrouchyelledatthegroomertostopwhenshesawGoochwasstrugglingtobreathebutshesaidshewasignored.IfIcouldhavewalkedIwouldhaveputmyhandsonherandpulledheroffmydogandphysicallystoppedherbutIcan'tdothat.GoochwasnotatrainedserviceanimalbutnaturallyhelpedCrouchbypickingupthingsforher. Thiscaseisabsoluteanimalabuse虐待LarryObrechtdivisionmanageroftheOaklandCountyAnimalShelterinAuburnHillssaid. PeoplewhoreadthestorycontactedOaklandPresstoofferhelp.AmessagefromRebeccaAmettofGigglesNWigglesPuppyRescueinRosevillesaidWehavepuppiestodonateandwanttohelptheyoungwomanwholostherservicedog. WhenGoochwaswithmeIwashappyCrouchsaidIthinkIcanbehappyagainbutnoanimalcanreplaceGooch.There'snevergoingtobeanotherGoochouttherebutIthinkIwillfindadogthatcanbringmejoyagain. 1Peoplecalledandemailedto. A.givetheirangryvoicetothegroomer B.offerhelpandcaretoLaurieCrouch C.tellCrouchhowtopunishthegroomer D.offeracureforCrouch'sdisease 2Goochdiedmainlybecause. A.thegroomerwascareless B.thegroomerdidn'tknowhowtotrimthedog'snails C.thegroomersatonthedogwithanotherman D.thedogwaswearingacollar 3WhatdoweknowaboutCrouch'sdog? A.Itwasaspeciallytrainedservicedog. B.Itwastrainedtodomanythingsforpeople. C.ItwasCrouch'sonlyfriend. D.ItcouldoffersomehelptoCrouch. 4Whatdoesthepassagemainlytellus? A.Adisabledwoman'sservicedog. B.Acruelgroomerkilledadisabledwoman'sdog. C.People'sloveforadisabledwomanwholostherdog. D.Adisabledwomanlovestohavethedogascompany.
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他们谈起话来就好像长时间的老朋友一样. Theytalkedasiftheyoldfriendsforalongtime.
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假设你是南阳中学的学生李华将参加主题为Let'spickupabookandread的英语演讲比赛.请你写一份演讲稿主要内容包括 1.目前很多学生课余时间沉溺于网络远离书本导致记忆力减退对学习失去兴趣等问题. 2.阅读的益处如开阔视野增强理解力提高成绩等. 注意1.词数100左右.演讲稿开头和结尾已给出但不计入总词数. 2.可适当增加细节以使行文连贯. Goodmorningeveryone I'mLiHuafromNanyangMiddleSchool.ThetopicofmyspeechisLet'spickupabookandread. Thankyou!
IntheUSAColumbusDayisinmofthearrivalofChristopherColumbusintheNewWorld.
It'sasadandfamiliarvoicethatweoftenhearinbigcitiesCanyousparesomechange? Usuallywhenfacedwiththatparticular1IhavefeelingsofguiltifIpassby2givingacoinortwo. Ihadthatfeeling3inVenicewhileonatourofItaly'sfamoussitesin2006.Ihadtakenrefugefromthe4inaquietcafé.Outsidetherewasanoldwomankneelingonthehardancientpavingstones5. Steady6oftouristswerewalkingpasther.Ayoungbackpackerstoodawayfromthecrowd7drinkinginthescenerybutInoticedtheyoungtravelerwasalso8theoldwoman. Atouristgroupwalkedalongthestreet9thewomanandwalkedon.10groupoftouristsarrivedandwalkedpasttheoldlady.Thebackpackerwatched11everybodyelsewentontheirwayfocusedonthe12aroundthem.ThenIwaspreparingtoleavewhenIcaughtsightofthebackpackersteppingforwardand13somemoneyinthewoman'scup.Hedidthissomewhat14justbeforethearrivalofanothertouristgroup.AsI15theleaderofthegroupstoppedandputsomemoneyinthecup.Havingbeenshownthewayothertouristsfollowedsuitand16somemorecoinstothecup. Hisworkdonetheyoungmanwalkedovertotheoldbeggar﹣womanpattedherontheshoulderandsaidIhopethat17alittle. Idon'tknowifthewomanunderstoodhisEnglishor18whathadjusthappenedbutIdid. Iplacedsomemoneyinthewoman'scupandcontinuedmytravels19afterwitnessingsuchan20actofkindness. 1A.sound B.question C.excuse D.command 2A.beyond B.after C.without D.before 3A.manytimes B.sometimes C.onlyonce D.onceagain 4A.crowds B.families C.streets D.signs 5A.singing B.crying C.begging D.trembling 6A.streams B.packs C.masses D.groups 7A.simply B.seemingly C.similarly D.specially 8A.showing B.following C.checking D.observing 9A.glancedat B.laughedat C.rushedat D.staredat 10A.One B.More C.Another D.Other 11A.if B.since C.because D.as 12A.stones B.sights C.signs D.tourists 13A.lending B.borrowing C.placing D.taking 14A.accidentally B.successfully C.deliberately D.cheerfully 15A.watched B.shown C.understood D.walked 16A.changed B.charged C.found D.added 17A.measures B.helps C.explains D.matters 18A.recognized B.caught C.realized D.figured 19A.pleasant B.annoyed C.disappointed D.delighted 20A.beautiful B.admirable C.pure D.accurate
Abdietandregularphysicalactivitywillhelpyoukeepfit.
ThemusicwaswrittenbyAbingafolkmwhowasborninthecityWuxiin1893.
BothEnglishandFrenchareolanguagesinCanada.
Tobehalotofpeopleattachgreatimportancetobecomingrichandfamous.
难以相信的是itactuallyworks.
HowtomakeQuickDecisionsForYourLife Wemakedecisionseveryday.1Whenitcomestomakingdecisionschoosingtherightonecanattimesbestressfulespeciallyifthedecisionmustbemadequickly.Indecisionoftenweighsusdownbuttherearesomeusefultipsformakingquickdecisionsmoreeasily. 2Sometimesthekeytomakingaquickdecisioncomesdowntoplanningaheadoftimeforjustsuchanoccasion.Weallknowwe'regoingtocometoanimportantdecision﹣makingpointsoonerorlatersohavingaplanalreadyinhandcanputourmindateasewhenthattimecomes. Overcomefear.3Whileitmayseemdifficulttoovercomethefearofmakingthewrongchoicemanyexpertsagreethatweshouldn'tbeafraidtomakethewrongdecisionevenifitseemsimportant.Thevastmajorityofwrongdecisionscanbecorrectedwhiledelayingdecisionscanoftenleadtomoreproblems. Writedownalltheadvantagesanddisadvantagesofyourdecision.Evenifyoudon'thavealltheinformationwritingdownalltheprosandcons优缺点isagoodstartingpointforfiguringoutwhattodo.Incaseswheretheresimplyisn'tenoughtimetowritethingsdownmakeamentallistinyourmind.Thinkingoftheprosandconscanhelpyouorganizeyourthoughts.4 Determinecriteria.Rememberthateverydecisionyoumakeshouldcomewithacertainlistofcriteria.5Butonceyouknowtherequirementsyou'relookingformakingadecisionwillbecomeeasier.Lookforthechoicethatsatisfiesthelistyou'vemadeandoncethatchoiceisfoundyoushouldmoveaheadwithit. A.Haveaplan. B.Thelistmaybeshortorquitelong. C.Communicateyourdecisionwithothers. D.Andthiscanalwaysleadtoaclearanswer. E.Socutoutanyoptionsthatyouknowyouwillnotchoose. F.Oftenonethingthatkeepsusfrommakingdecisionsisfear. G.Somecanbeveryimportantwhileothersarenotseriousinthelongrun.
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